LONDON—British police say they have “reasonable grounds” to suspect that local officials may have committed corporate manslaughter in a deadly highrise fire in London.

The Metropolitan Police force said Thursday it has officially informed the Royal Borough of Kensington and Chelsea and the Kensington and Chelsea Tenant Management Association that they are under suspicion.

The news came in a letter from police to Grenfell Tower residents. The force confirmed to the Associated Press that the letter is genuine.

At least 80 people died when fire ripped through the public housing highrise on June 14.